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Date: Fri, 6 Feb 2009 18:55:18 +0100
From: Andrea Arcangeli <aarcange@redhat.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Greg KH <greg@kroah.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       mtk.manpages@gmail.com, linux-man@vger.kernel.org,
       linux-kernel@vger.kernel.org
Subject: Re: open(2) says O_DIRECT works on 512 byte boundries?
Message-ID: <20090206175517.GR14011@random.random>
References: <20090128213322.GA15789@kroah.com> <20090129141338.34e44a1f.kamezawa.hiroyu@jp.fujitsu.com> <20090129160826.701E.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20090130061714.GC31209@kroah.com> <20090202220856.GY20323@random.random> <20090203102920.684e7b67.kamezawa.hiroyu@jp.fujitsu.com> <20090203023147.GZ20323@random.random> <20090203115540.86a01273.kamezawa.hiroyu@jp.fujitsu.com>
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On Tue, Feb 03, 2009 at 11:55:40AM +0900, KAMEZAWA Hiroyuki wrote:
> No need to make a patch for copy_hugetlb_page_range() ?
> IMHO, HugeTLB can be write-protected at fork().

Yeah that was entirely correct, thanks Kame! I reproduced it with
libhugetlbfs and verified it fixed it now.